The old fashioned VIN plates in the 1920s were quite different than you're used to

https://libwww.freelibrary.org/digital/item/55510

It's been a while since I've found one at a car show...

this one from 2012 is the first one I recall finding
https://justacarguy.blogspot.com/2013/12/the-runner-ups-from-2012-archives-also.html

https://justacarguy.blogspot.com/2015/04/1929-chrysler-model-75.html  here's one from 2015 on a 1929 Chrysler, it's similar but interestingly different

https://justacarguy.blogspot.com/2017/06/1928-chrysler-model-77-one-with-cool.html

1930 Stutz https://rmsothebys.com/en/auctions/mo10/auction/lots/r186-1930-stutz-model-m-supercharged-coupe